Organic electroluminescent compound and organic electroluminescent device comprising the same

An organic electroluminescent device comprising a first electrode;

• a second electrode;
• and a plurality of organic layers comprising a light-emitting layer between the first electrode and the second electrode, wherein at least two layers of the organic layers comprise one or more compounds represented by the following formula 3-2:
• wherein R6′ to R9′ each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted (3- to 60-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a fused ring group of a substituted or unsubstituted (C3-C30) aliphatic ring(s) and a substituted or unsubstituted (C6-C30) aromatic ring(s), a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted (C6-C30)aryloxy, a substituted or unsubstituted mono- or di-(C1-C30)alkylamino, a substituted or unsubstituted mono- or di-(C2-C30)alkenylamino, a substituted or unsubstituted mono- or di-(C6-C30)arylamino, a substituted or unsubstituted mono- or di-(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C1-C30)alkyl(C2-C30)alkenylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(3- to 30-membered)heteroarylamino, a substituted or unsubstituted (C2-C30)alkenyl(C6-C30)arylamino, a substituted or unsubstituted (C2-C30)alkenyl(3- to 30-membered)heteroarylamino, or a substituted or unsubstituted (C6-C30)aryl(3- to 30-membered)heteroarylamino, or may be linked to an adjacent substituent to form a ring(s);
• X′ represents O, S, or N—R11′;
• R11′ represents -L11-Ar3;
• L11 represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (5- to 30-membered)heteroarylene;
• Ar3 represents hydrogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted mono- or di-(C6-C60)arylamino, a substituted or unsubstituted mono- or di-(3- to 60-membered)heteroarylamino, or a substituted or unsubstituted (C6-C60)aryl(3- to 60-membered)heteroarylamino;
• and h′ and i′ each independently represent an integer of 1 to 4, f′ represents an integer of 1 to 3, and g′ represents an integer of 1 to 2, where if f′ to i′ are an integer of 2 or more, each of R6′ to each of R9′ may be the same or different;
• wherein the compound represented by formula 3-2 comprised in at least one organic layer is represented by formula 1, and the compound represented by formula 3-2 comprised in at least another organic layer is represented by formula 4:
• wherein
• L1 and L2 each independently represent a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (5- to 30-membered)heteroarylene;
• Ar1 represents a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (5- to 30-membered)heteroaryl;
• Ar2 represents the following formula 1-2;
• wherein
• at least one of Ar21 to Ar23 each independently represent the following formula 1-2, and the other(s) of Ar21 to Ar23 each independently represent a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (5- to 30-membered)heteroaryl;
• L21 to L23 each independently represent a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (5- to 30-membered)heteroarylene;
• R1 and R2 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (5- to 30-membered)heteroaryl;
• R6 to R9 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (5- to 30-membered)heteroaryl, or may be linked to L2, or also may be linked to one or more of L21 to L23;
• X represents O, S, or N—R11;
• R11 represents a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (5- to 30-membered)heteroaryl, or may be linked to L2, or also may be linked to one or more of L21 to L23;
• and
• a, b, h, and i each independently represent an integer of 1 to 4, f represents an integer of 1 to 3, and g represents an integer of 1 to 2, where if a to i are an integer of 2 or more, each of R6 to each of R9 may be the same or different.